Refrigerator



June 19, 1923 1,459,280

, CJG.CARD

REFRIGERATOR Filed March 1922 4 2 Sheets-Sheet 1 H/w/l/role 6 7; 40 1 9. C zea'.

Patented June I9, I923.

. Ifltfit FAT @FIE.

CALVIN G. CARD, DE LOS ANGELES, CALIFORNIA.

REFRIGERATOR.

Application filed March 6, 1922. Serial No. 541,575.

existing types of refrigerators, to provide a refrigerator havin vacuum chambers, in its walls, thereby ena ling the contents of the refrigerator to be maintained at relatively low temperatures for considerable periods of time, and further to provide a refrigerator that may be easily and cheaply produced and which will be very-effective in performing its intended functions.

Other objects and advantages will hereinafter appear and while I have shown and will describe one preferred form of construction, I wish it to be understood that I do not limit myself to such preferred form and that various changes and adaptations may be made therein without departing from the spirit of my invention as hereinafter claimed.

In the accompanying drawings, Fig. 1 is a perspective view of a refrigerator of my improved construction.

Fig. 2 is an enlarged detail view taken on the line 2--2 of Fig. 1. I

Fig. 3 1s a perspective view of a portion of a joint member that is made use of in carrying out my invention.

Fig. 4; is a perspective View of a spacing member that is used in the vacuum chambers of the refrigerator.

Fig. 5 is an enlarged horizontal section taken on the line 5-5 of Fig. 1. I

Fig. Sis a perspective view of a modified form of the refrigerator.

Fig; 7 is a detail view of a'modified form of the joint between the sections of glass that are utilized in my improved refrigerator.

As illustrated in the accompanying drawings the refrigerator is substantially square or rectangular, and comprises an outer wall or'sheathing 10, preferably of wood, a lining 11 of glass or analogous material that is arranged on the inner face of the sheathing 10; a second lining 12 of glass or analogous material, spaced apart from the lining 11 to form a vacuum chamber 13 and an inner wall or sheathing 14, preferablyof corrugated metal 14 that lies immediately against the linin 13. The sections of glass forming the linings 11 and 12 are maintained inspaced relation by L-shaped spacing members 15 that are arranged in the corners of the chamber 13. Packing strips 16 preferably of rubber are arranged between the adjacent edges of the sections of glass forming the linings 11 and 12; said strips being provided with substantially V-shaped channels I 17 that receive the edges of theglass sections.

The front of the body of the refrigerator includes a frame 18, against which the front edges of the sections of glass in the side walls and top and bottom of the refrigerator engage. Arranged between the front edges of these sections of glass and the frame 18 are packing strips 19 preferably of rubber. Arranged in the frame 18 is a series of doors 20 that are hung on suitable hinges 21 and provided with suitable locks 22. Formed in each door is a vacuum chamber 23 that is lined with sections of glass 24 and the joints between the latter are packed with strips 25 preferably of rubber.

A pipe 26 leads from the vacuum chamber 13 outwardly through the outer wall of the refrigerator body, said pi e being provided with a valve 27. Asuitahle vacuum pump may be attached to this pipefor the purpose of exhausting the air from chamber 13.

In Fig. 6 I have illustrated a refrigerator 'body having two box like seamless members 28 of glass, one of smaller dimensions and arranged within the other to form a vacuum chamber 29, and the front edges ,of the glass stri s 32, an interposed packing strip 33 of rub er and a screw 34 that may be tightened to draw strips 32 together. A refrigerator of my improved construction is relatively simple, may be easily. and cheaply produced, and by providing vacuum chambers in the walls and doors of the structure,.

th convection of heat or higher temperatures from the exterior to the interior of the refrigerator. is reduced to a minimum so that foodstufis and the like placed in the refrigerator may be maintamed in cool condition for indefinite periods.

I claim as my invention:

5 1. A refrigerator having vacuum chambers formed in its walls, sections of glass lining said vacuum chambers and lL-shaped spacing members arranged between said sections of glass in the corners of said vacuum 10 chambers.

. 2. A refrigerator having vacuum chambers formed in its walls, sections of lass lining said vacuum chambers and pac ing strips arranged between the edges of said sections of glass.

3. In a refrigerator a wall comprising an outer sheathing of wood, an inner sheat ing of metal and sections of lass s aced apart andarranged against the mner aces of said.

inner and outer sheathings.

CALVIN Gr. man. 

